Optical microring resonator filter design trade-offs

Alastair D. McAulay; Michael R. Corcoran; Christopher J. Florio; Ian B. Murray

doi:10.1117/12.580694

25 October 2004 Optical microring resonator filter design trade-offs

Alastair D. McAulay, Michael R. Corcoran, Christopher J. Florio, Ian B. Murray

Proceedings Volume 5595, Active and Passive Optical Components for WDM Communications IV; (2004) https://doi.org/10.1117/12.580694
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

A microring resonator, a circular waveguide adjacent to a straight waveguide, performs selective band-stop filtering for optical telecommunications. Small size and versatility of functionality allow many microrings to be incorporated into a single integrated optic circuit. We desire small size, less than 20 micron radius; low insertion loss in band-stop outside resonance; perfect cancellation to zero in band-stop at resonance; and low refractive index difference between core and cladding. These requirements are conflicting: conventional silicon waveguides cannot achieve low enough loss at the desired bend radius. Current approaches use different materials with higher refractive index differences. Analysis and simulation provide evaluation of the trade-offs. Further, we propose, for the first time, conventional waveguides using Bragg reflectors surrounding the microring to reduce loss for improved performance. Simulation shows feasibility of this approach.

Citation Download Citation

Alastair D. McAulay, Michael R. Corcoran, Christopher J. Florio, and Ian B. Murray "Optical microring resonator filter design trade-offs", Proc. SPIE 5595, Active and Passive Optical Components for WDM Communications IV, (25 October 2004); https://doi.org/10.1117/12.580694

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